koreanfestivals1-1, Exercise 2: Calendars and new festivals

Model answer:

Koreans now mostly use the Gregorian calendar, adopted in 1896 by Gojong, but traditional holidays (and age-reckoning for older generations) still follow the traditional lunisolar calendar. The holidays whose solar dates are listed in the public holidays article as moving are Lunar New Year's Day, Buddha's Birthday and Chuseok.
The festivals article says many new festivals have originated in South Korea in response to the country's tourism initiatives, and that a gradual change to a five-day work week and greater leisure contributed to the growth.

Sources: Wikipedia, Korean calendar; Public holidays in South Korea; Festivals in South Korea.